CVE-2011-0040: Input Validation
First published: Wed Feb 09 2011(Updated: )
The server in Microsoft Active Directory on Windows Server 2003 SP2 does not properly handle an update request for a service principal name (SPN), which allows remote attackers to cause a denial of service (authentication downgrade or outage) via a crafted request that triggers name collisions, aka "Active Directory SPN Validation Vulnerability."
Credit: secure@microsoft.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Microsoft Windows Server 2003 | =sp2 | |
| Microsoft Windows Server 2003 | =sp2 | |
| Microsoft Windows Server 2003 | =sp2 |
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Reference Links
- http://www.securityfocus.com/bid/46145
- http://www.vupen.com/english/advisories/2011/0319
- http://secunia.com/advisories/43215
- http://osvdb.org/70825
- http://www.securitytracker.com/id?1025042
- https://exchange.xforce.ibmcloud.com/vulnerabilities/64915
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12485
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-005
Frequently Asked Questions
What is the severity of CVE-2011-0040?
CVE-2011-0040 has a high severity level as it allows remote attackers to cause denial of service through crafted requests.
How do I fix CVE-2011-0040?
To fix CVE-2011-0040, ensure that your Microsoft Windows Server 2003 is updated with the latest patches from Microsoft.
What systems are affected by CVE-2011-0040?
CVE-2011-0040 affects Microsoft Windows Server 2003 SP2 and its variants including x64 and Itanium.
Can CVE-2011-0040 be exploited remotely?
Yes, CVE-2011-0040 can be exploited remotely by attackers sending specially crafted requests.
What impact does CVE-2011-0040 have on authentication?
CVE-2011-0040 can lead to authentication downgrades or outages, impacting the availability of services.
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